Project modernization (#630)

* Fixed boats falling and a TP glitch #266

* Replaced every C-style cast with C++ ones

* Replaced every C-style cast with C++ ones

* Fixed boats falling and a TP glitch #266

* Updated NULL to nullptr and fixing some type issues

* Modernized and fixed a few bugs

- Replaced most instances of `NULL` with `nullptr`.
- Replaced most `shared_ptr(new ...)` with `make_shared`.
- Removed the `nullptr` macro as it was interfering with the actual nullptr keyword in some instances.

* Fixing more conflicts

* Replace int loops with size_t and start work on overrides

Minecraft.Client/Common/DLC/DLCGameRulesHeader.cpp

@@ -11,14 +11,14 @@
 
 DLCGameRulesHeader::DLCGameRulesHeader(const wstring &path) : DLCGameRules(DLCManager::e_DLCType_GameRulesHeader,path)
 {	
-	m_pbData = NULL;
+	m_pbData = nullptr;
 	m_dwBytes = 0;
 
 	m_hasData = false;
 
 	m_grfPath = path.substr(0, path.length() - 4) + L".grf";
 
-	lgo = NULL;
+	lgo = nullptr;
 }
 
 void DLCGameRulesHeader::addData(PBYTE pbData, DWORD dwBytes)